How would these gouges be removed?
07-11-21, 04:13 PM
#1
Junior Member
Thread Starter
Join Date: Apr 2008
Posts: 160
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
How would these gouges be removed?
There are deep scratch marks on my chain stay from a (previous owner's) dropped chain (pic below). I ground/sanded the high bulges, but the pits remain. How would one remove these? Would powder coating fill these in? They aren't super deep, but definitely noticeable.
Thanks!
Thanks!
07-11-21, 04:37 PM
#2
Senior Member
Join Date: Dec 2019
Posts: 953
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 321 Post(s)
Liked 263 Times
in
212 Posts
Idk if powder coating would fill them in but a very small amount of car body filler sanded down smooth (it's very easy to sand) should do the trick.
07-11-21, 04:42 PM
#3
Senior Member
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 27,547
Mentioned: 217 Post(s)
Tagged: 0 Thread(s)
Quoted: 18349 Post(s)
Liked 4,502 Times
in
3,346 Posts
I'm assuming that is aluminum.
There is aluminum brazing which should work reasonably well.
Or welding?
There is aluminum brazing which should work reasonably well.
Or welding?
07-11-21, 05:19 PM
#5
Senior Member
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 27,547
Mentioned: 217 Post(s)
Tagged: 0 Thread(s)
Quoted: 18349 Post(s)
Liked 4,502 Times
in
3,346 Posts
07-11-21, 05:46 PM
#7
Banned.
Join Date: Jun 2004
Location: Torrance, CA
Posts: 3,061
Bikes: Homebuilt steel
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 2193 Post(s)
Liked 425 Times
in
337 Posts
There are high temperature powder coating friendly filler materials but why bother? Those marks are pretty small and not worth messing with in my opinion.
Last edited by Nessism; 07-12-21 at 08:10 AM.
07-11-21, 07:17 PM
#8
Senior Member
Join Date: Feb 2012
Location: Rochester, NY
Posts: 18,053
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4194 Post(s)
Liked 3,837 Times
in
2,295 Posts
As often is the case I see and wish to comment on something else then the object in question. I see "U" brake mounts. Were I to rehab this frame I would strongly consider removing them (and their cable routing bits) and install seat stay bosses (and cable path bits). Andy (who has cut his hands on too many chainrings dealing with these stupid things)
__________________
AndrewRStewart
AndrewRStewart
07-11-21, 08:21 PM
#9
Junior Member
Thread Starter
Join Date: Apr 2008
Posts: 160
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
As often is the case I see and wish to comment on something else then the object in question. I see "U" brake mounts. Were I to rehab this frame I would strongly consider removing them (and their cable routing bits) and install seat stay bosses (and cable path bits). Andy (who has cut his hands on too many chainrings dealing with these stupid things)
07-11-21, 08:22 PM
#10
Junior Member
Thread Starter
Join Date: Apr 2008
Posts: 160
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Likes: 0
Liked 2 Times
in
2 Posts
That's good to know. I think I'll ask my powder coating place. If it's not expensive, and they know how to do it, why not? It's there getting painted anyway.
07-11-21, 10:58 PM
#11
Randomhead
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 24,385
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 3,686 Times
in
2,509 Posts
I think I would have the powder coater fill them. They might have done it without asking.
07-11-21, 11:28 PM
#12
Senior Member
Join Date: Aug 2012
Location: Seattle
Posts: 507
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 103 Post(s)
Liked 144 Times
in
88 Posts
You may be able to fill it with high temp filler. Tell your powder coater that you have done this or talk to them before doing it to see if they have recommendations. Usually, they will sandblast a frame before powder and that will remove the filler anyway. If it was in my shop, I'd float some silver over them and blend them in. Find a local jeweler at your local craft fair and see if they might be able to do this for you. Silver (56%) won't be affected by the heat from powder coating.
__________________
https://www.flickr.com/photos/54319503@N05/
https://www.draper-cycles.com
https://www.flickr.com/photos/54319503@N05/
https://www.draper-cycles.com
07-12-21, 11:34 PM
#15
Senior Member
Join Date: Aug 2012
Location: Seattle
Posts: 507
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 103 Post(s)
Liked 144 Times
in
88 Posts
Do you know if it will take sandblasting? My coater bakes items at 400" for an hour, then media blasts them, then coats and cures. He has a hard rule against non-metal fillers. Talk to them before you contract them. They don't want to disappoint you. They are craftspeople too.
__________________
https://www.flickr.com/photos/54319503@N05/
https://www.draper-cycles.com
https://www.flickr.com/photos/54319503@N05/
https://www.draper-cycles.com
07-13-21, 01:12 AM
#16
Randomhead
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Posts: 24,385
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Liked 3,686 Times
in
2,509 Posts
Definitely ask the powder coater before you do anything other than get someone to fill it with brazing material. That's what most of the regulars here would do, but if I couldn't do that myself, I'm fairly confident that a power coater can successfully fill the gouges for you.
07-13-21, 06:53 AM
#17
framebuilder
As a frame builder and liquid wet painter, I'd do like Duanedr suggested and fill it with 45 or 56% silver (because that is what I have on hand). And then of course file and emery it smooth. It could be done with brass too but I'd rather use lower temperature silver.
